1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d155bf7a14d15416b6cd1786e93cdc10b6b2efb9425c9a223b26339db34ebb. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7abef34c-8e03-44b8-8fa0-fe9ca0cda7e5.json and https://artists.proofprofile.net/proofs/artist/7abef34c-8e03-44b8-8fa0-fe9ca0cda7e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b72cd29d1f665b6fd2a1b5b0de6b079500a2bb5ca187d975df6a22935208e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82541420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4be58f090f116ec412132624e68b4149f63f79c127578c260868b08597dbd7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82541418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c806b6c9a77645366dcf7a1ec69e485e986236b54ae8b867c25966e71e23e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82541419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d81bd198b771f05217330f8a469904bcc7d70db4796cd65916223c86f2ff7e4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82541421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa210647826cee1c72ea13b08aa5cd027059933f80b6c4ecac510aded6c13a5d. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82542918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec4f114b81eba254d9df3a3b1c5f2f117959eb88906439a6f7b72a8aaa2e8b4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82544155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786810efe21bc5811833ca1fa4810fc8aca4b6ad78c1e66eeafbaa25e03894a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:23:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92589851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb243adfa93e05bcca36b1b4bca80a4c3fc277caf0777f688fee5372e4a87d6cf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92588428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1df6256ad157e16c3b4d806471df01c8f1b8cf9504f39f31d41f1ccb61475c5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92588445.